Well, the greenhouse effect is because of our fault because we don't care about our planet and if we continue like that we'll destroy it.
It's the effect which produces to increase heat on earth by don't letting go ou

i'll explain it better, solar radiation enter in our planet and if there weren't gases produced by us that radiation will gou out but we are creating every year even more than the last year so every day there're more gases created by factories, cars, and a lot of more insane products so radiation can't exit as it needed so the earth is getting hotter each day.
If we continue like that the medium temperature will be increased, so the earth poles will deice and the sea level will increase so some island could dissapear.
We have to do something to stop it!!